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Experimental and modeling study of wettability alteration through seawater injection in limestone:a case study

Petroleum Science 2020年第3期17卷 749-758页

作者： Omolbanin Seiedi Mohammad Zahedzadeh Emad Roayaei Morteza Aminnaji Hossein Fazeli Improved Oil Recovery Institute.National Iranian Oil Company(NIOC) Tehran ***Iran Institute of Petroleum Engineering University of TehranP.O.Box 11155-4563TehranIran Present Address:Sharif Upstream Petroleum Research Institute(SUPRI) Sharif University of TechnologyTehranIran Present Address:Research Institute of Petroleum Industry(RIPI) TehranIran School of Chemical Engineering and Analytical Science University of ManchesterManchesterUK Geochemistry Research Group University of NottinghamUniversity ParkNottinghamUK

Water flooding is widely applied for pressure maintenance or increasing the oil recovery of *** heterogeneity and wettability of formation rocks strongly affect the oil recovery efficiency in carbonate *** seawater injection in carbonate formations,the interactions between potential seawater ions and the carbonate rock at a high temperature can alter the wettability to a more water-wet *** paper studies the wettability of one of the Iranian carbonate reservoirs which has been under Persian Gulf seawater injection for more than 10 *** wettability of the rock is determined by indirect contact angle measurement using rise in core ***,the characterization of the rock surface is evaluated by molecular kinetic theory(MKT)*** data obtained from experiments show that rocks are undergoing neutral wetting after the aging *** the wettability of low permeable samples changes to be slightly water-wet,the wettability of the samples with higher permeability remains unchanged after soaking in *** data and MKT analysis indicate that wettability alteration of these carbonate rocks through prolonged seawater injection might be insignificant.

关键词： Wettability Carbonate rock Seawater injection Dynamic contact angle rise in core Molecular kinetic theory

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